Vapor phase isomerization of methyl-substituted aromatic hydroca

Details Vapor phase isomerization of methyl-substituted aromatic hydroca Vapor phase isomerization of methyl-substituted aromatic hydroca

1978-02-28

1979-05-01

O'Keefe, Veronica

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By isomerization

585488, 585489, 252455Z, C07C 1500, C07C 1502

Patent

active

041523636

ABSTRACT:
An improved vapor phase process is provided for isomerization of monocyclic methyl-substituted aromatic hydrocarbons. The process involves contacting said aromatic hydrocarbons with a catalyst material containing a crystalline aluminosilicate zeolite characterized by a silica/alumina mole ratio of at least 12 and a constraint index, hereinafter defined, within the approximate range of 1 to 12, in a reaction zone maintained under conditions such that said isomerization is accomplished in the vapor phase. The improvement resides in the catalyst being highly diluted, such as with alumina, and the reaction temperature being maintained at greater than 800.degree. F.

REFERENCES:
patent: 3856872 (1974-12-01), Morrison
patent: 3856873 (1974-12-01), Burress
patent: 3887630 (1975-06-01), Ward

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